The Cowboys said X-rays were negative and that Williams, expected to be the team’s No. 1 receiver with Terrell Owens gone, is day-to-day.

Williams arrived from winless Detroit in mid-October and received a $45 million, five-year contract extension.

Cornerback Mike Jenkins returned to practice after missing a week with a sprained right ankle. Neither Jenkins nor Terence Newman, among the team’s top three cornerbacks, played in the preseason opener Thursday night. Newman sustained a slight groin strain Aug. 8, the same day Jenkins was hurt.

Coach Wade Phillips expects Newman to be back at practice today, when the Cowboys have only an afternoon workout. Phillips has said Newman and Jenkins could have played last week if it were the regular season.

→Broncos: Receiver Brandon Marshall and free safety Brian Dawkins returned to practice. Marshall had missed more than a week of workouts with a leg injury. Friday, an Atlanta jury found him not guilty of misdemeanor battery against his former girlfriend.

Dawkins had his right hand heavily wrapped and was wearing an orange protective jersey.